USB serial LED controller

Description:

This is a USB serial port that controls 3-onboard LEDs. The design came about because a client was using a FIT-PC as a development framework running software that would be connected to a remote client. There was now way to display the status of the connection because there was no display attached.

With this LED board, the application running on the FIT-PC was able to control the LED status with serial port commands like:

LED RED
LED RED BLINK
LED RED ...

Even better, the timer on the board is used so that if the application set the LED GREEN, and didn't update that status within 10 seconds, the LED would change back to a watchdog LED status. How cool is that?

Documents:

• Schematic page: SCH-ULED3-01.pdf
• Digikey BOM: PCA-USB3-01-BOM.xlsm

The Source Eagle project:

• SCH-ULED3-01.zip: Eagle schematics and layout
• PCB-ULED3-01.zip: Gerbers and assembly information

Application file:

• LED Controller: USB_LED3_src.zip

Source files:

• Windows EXE: USB_LED3_app.zip
• Windows Source: USB_LED3_appsrc.zip